Hi
On Sat, Mar 11, 2006 at 06:38:41PM -0800, Mike Melanson wrote:
> Hi,
> Are there any limits on Huffman tables in FFmpeg? I guess I am
> asking about codeword sizes. There are some tables in AAC where the
> codewords reach up to 19 bits it size. But then, SVQ1 has some 22-bit
> codewords and FFmpeg seems to have no trouble handling those. Are there any
> special concerns with larger codeword sizes?
init_vlc() should work fine with upto 32bit long codewords, for larger ones
it should be a matter of int->uint64_t but so far no codec needed >32
get_vlc2() is currently limited to a max of table depth of 3, so that puts
a bits_per_table*3 limit on the codeword size, bits_per_table is 9 commonly
this also hasnt been an issue, increasing this limit is a matter of adding 5
lines or so to GET_VLC
[...]
--
Michael